*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f8f9fc;
            color: #1e1e2a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #0056b3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #ff7a00;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b1a2e;
        }
        h1 {
            font-size: 2.2rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem 0;
            border-left: 6px solid #ff7a00;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.4rem;
            margin: 2rem 0 0.75rem 0;
        }
        h4 {
            font-size: 1.15rem;
            margin: 1.5rem 0 0.5rem 0;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.5rem 2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 0.5rem;
        }
        .site-header {
            background: linear-gradient(145deg, #0b1a2e 0%, #1a2f44 100%);
            color: #fff;
            padding: 0.8rem 0;
            border-radius: 0 0 20px 20px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffd966;
            letter-spacing: 1px;
            text-shadow: 0 2px 8px rgba(255, 122, 0, 0.3);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.03);
            color: #ffecb3;
            text-decoration: none;
        }
        .my-logo i {
            margin-right: 0.4rem;
            color: #ff7a00;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e0e7f0;
            padding: 0.5rem 0.9rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.92rem;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background: rgba(255, 122, 0, 0.25);
            color: #ffd966;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid #ffd966;
            color: #ffd966;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 122, 0, 0.2);
        }
        .breadcrumb {
            background: #fff;
            padding: 0.7rem 1.2rem;
            border-radius: 40px;
            margin: 1.2rem 0;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            font-size: 0.92rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem;
        }
        .breadcrumb a {
            color: #2a4a6a;
        }
        .breadcrumb span {
            color: #888;
        }
        .hero-figure {
            margin: 1.8rem 0 2.5rem 0;
            border-radius: 18px;
            overflow: hidden;
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
            background: #e6edf5;
            text-align: center;
        }
        .hero-figure img {
            width: 100%;
            max-height: 560px;
            object-fit: cover;
        }
        .hero-figure figcaption {
            padding: 0.8rem 1.2rem;
            font-size: 0.95rem;
            color: #2a4a6a;
            background: #f0f4fa;
            font-style: italic;
        }
        .search-section {
            background: #fff;
            padding: 1.8rem 2rem;
            border-radius: 20px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            margin: 2rem 0;
        }
        .search-section h3 {
            margin-top: 0;
        }
        .search-form {
            display: flex;
            gap: 0.8rem;
            flex-wrap: wrap;
            margin-top: 0.5rem;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 0.8rem 1.2rem;
            border: 2px solid #dce3ed;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.25s;
        }
        .search-form input:focus {
            border-color: #ff7a00;
        }
        .search-form button {
            background: #0b1a2e;
            color: #ffd966;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #1a2f44;
            transform: translateY(-2px);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
        }
        .feedback-card {
            background: #fff;
            padding: 1.8rem 2rem;
            border-radius: 20px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.7rem 1rem;
            border: 2px solid #dce3ed;
            border-radius: 12px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.25s;
            font-family: inherit;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #ff7a00;
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card button {
            background: #ff7a00;
            color: #fff;
            border: none;
            padding: 0.75rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #e06600;
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            gap: 0.4rem;
            font-size: 1.8rem;
            color: #ffb800;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            transition: color 0.15s, transform 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #ff7a00;
            transform: scale(1.1);
        }
        .content {
            background: #fff;
            padding: 2.5rem 2.8rem;
            border-radius: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            margin: 2rem 0;
        }
        .content p {
            text-align: justify;
        }
        .content .highlight {
            background: #fef3e0;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .content .insight-box {
            background: #eef4fb;
            border-left: 6px solid #ff7a00;
            padding: 1.2rem 1.8rem;
            border-radius: 12px;
            margin: 1.8rem 0;
            font-style: normal;
        }
        .content .insight-box strong {
            color: #0b1a2e;
        }
        .content .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.2rem;
            margin: 1.5rem 0;
        }
        .content .stat-item {
            background: #f5f8fd;
            padding: 1rem 1.2rem;
            border-radius: 14px;
            text-align: center;
            border: 1px solid #e6edf5;
        }
        .content .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #ff7a00;
        }
        .content .stat-item .label {
            font-size: 0.9rem;
            color: #4a5a6a;
        }
        .link-group {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 0.6rem 1.2rem;
            background: #f5f8fd;
            padding: 1.2rem 1.8rem;
            border-radius: 16px;
            margin: 1.2rem 0;
        }
        .link-group a {
            display: inline-block;
            padding: 0.2rem 0;
            font-weight: 500;
        }
        .link-group a::before {
            content: "🔗 ";
            font-size: 0.85rem;
        }
        .site-footer {
            background: #0b1a2e;
            color: #c8d6e5;
            padding: 2.5rem 1.5rem 1.5rem;
            border-radius: 24px 24px 0 0;
            margin-top: 3rem;
        }
        .site-footer a {
            color: #ffd966;
        }
        .site-footer a:hover {
            color: #ffecb3;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
            max-width: 1180px;
            margin: 0 auto;
        }
        .footer-grid friend-link {
            display: block;
            font-weight: 600;
            font-size: 1.1rem;
            color: #ffd966;
            margin-bottom: 0.8rem;
        }
        .footer-grid .friend-links-list {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }
        .footer-grid .friend-links-list a {
            color: #b0c4de;
        }
        .footer-grid .friend-links-list a:hover {
            color: #ffd966;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid #1f3a52;
            font-size: 0.9rem;
            color: #8aa0b8;
            max-width: 1180px;
            margin-left: auto;
            margin-right: auto;
        }
        .copyright strong {
            color: #ffd966;
        }
        @media (max-width: 820px) {
            .header-inner {
                flex-direction: row;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: #0f2238;
                padding: 1rem;
                border-radius: 16px;
                margin-top: 0.5rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.7rem 1rem;
                border-bottom: 1px solid #1f3a52;
            }
            .hamburger {
                display: block;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .content {
                padding: 1.5rem 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .hero-figure img {
                max-height: 300px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.4rem;
            }
            .content {
                padding: 1rem 0.8rem;
                border-radius: 16px;
            }
            .breadcrumb {
                font-size: 0.8rem;
                padding: 0.5rem 0.8rem;
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .feedback-card {
                padding: 1.2rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .link-group {
                grid-template-columns: 1fr;
            }
        }
        .last-updated {
            display: inline-block;
            background: #eef4fb;
            padding: 0.35rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #2a4a6a;
            margin-bottom: 1.2rem;
            font-weight: 500;
        }
        .last-updated i {
            margin-right: 0.4rem;
            color: #ff7a00;
        }
        .toc {
            background: #f5f8fd;
            padding: 1.2rem 1.8rem;
            border-radius: 16px;
            margin: 1.2rem 0 2rem;
        }
        .toc ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .toc ul li {
            padding: 0.2rem 0;
        }
        .toc ul li a {
            color: #0056b3;
        }
        .toc ul li a:hover {
            color: #ff7a00;
        }
        .btn-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #0b1a2e;
            color: #ffd966;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            transition: transform 0.2s, background 0.2s;
            z-index: 50;
            border: none;
            cursor: pointer;
        }
        .btn-top:hover {
            transform: translateY(-4px);
            background: #1a2f44;
        }
        @media (max-width: 600px) {
            .btn-top {
                bottom: 1rem;
                right: 1rem;
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
        }